Milling-machine.



P. A. GUENOT L L. G. FISCHER.

MILLING MACHINE. APPLIouIoN FILED 11111.15, 1910.

/ l 1,047,177, Patented Dec. 17,1912.

2 SHEETS-#SHEET 1.

` l @Memo/zd @ma a. 6M @Y w/bmwncgb@ 497m SUM/nut P. A. CUENO'I & L. G.FISCHER.

MILLING MACHINE. IPPLIOATION FILED xmms, 1910.

. 5mm/W92.;

wwwa/.vwo I (g lamentedDa.17,1912.v y

UNITED sTATEs PATENT oEEIcE.

PAUL A. CUENOT, 0F STEELTON, AND LEWIS G. FISCHER, 0F HABRiISBUBG,

PENNSYLVANIA.

MILLING-MACHINE.

Specication of Letters Patent.

To (1U v1.0/1 omy 'it m a?) concern.'

Be it known that we, PAUL A. CUENo'r and LEWIS G. FISCHER, citizens ofthe United States, and residents, respectively, of Steelton andHarrisburg, bot-h in the county of Dauphin and State of Pennsylvania,have invented certain new and useful Improvements in lllilling-Machines;and we do hereby declare the following to be a full, clear, and exactdescription o-f the invention, such as will enable othersskilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to letters or figures of refcrencemarked thereon, which form a part of this specification.

Our invention relates to milling machines, and hasfor its object toprovidey an efiicient and readily operated machine for milling orchamfering the ends of plates, angles, beams, and other structural ironand steel shapes.

The machine is provided with a slidlng head carrying one, or a group ofmilling cutters fed across the face of the work by Huid actuatedmechanism, with fluid actuated means to etfectually clamp the work underuniformly distributed pressure while being milled, and with details ofconstruction hereinafter more fully described, and particularly pointedout in the claims.

Referring to the drawings, in which like part-s are similarlydesignated-F i a front elevation of a milling mac ine embodying ourinvention; Fig. 2 isa side view thereof.

On a suitable base 1 is secured a work-v supporting table 2 having aremovable top 3,

This top as shown is constructed to receive and sust-ain a particularshape, to wit, angles, and to this end is provided with a vertical rib4. Other shaped tops are intended to replace this particular shaped topwhen necessary, to properly support other shapes 8, contain pistons alsosuitably connected to the head 10 near its sides, and operate to raisethe head 10 when the pressure on the large piston 9, is removed.

Patented Dea.17,1912.

The milling tool or tools 11 are'mounted on arbor 11a which` carries aworm wheel 12, said worm Wheel being driven by a worm 13 mounted in thehead 10, both fully inclosed thereby, and the worm being splined to avertical shaft 14 mounted in the frame 5. This shaft 14 has at its upperend a gear wheel 15, which is driven by a gear wheel 7 0, on a shaft 71,inside of the frame 5, receiving motion by a pair of miter gears 72, 73,from a main driving shaft 20.A

The afore-mentioned mechanism for rotating the milling tool or tools 11,forms no part of the present invention.

21 is a cylinder having an air inlet pipc 22, and an air outlet pipe 23and contains a piston 24 Whose piston rod 25 is connected by vpin 26, tofloating levers 27, there being two such floating levers pivotedtogether intermediate their' ends by pin 26. The lower ends of theselevers carry shoes 28 conforming to or fitting the particular structuralshape to be treated in the machine. These shoes are preferably, but notnecessarily, pivoted at 29 to the ends of the levers 27 and are limitedin their outward swing on their pivots 29by spring or other stops 30secured to the levers 27 and against which said shoes may rest.. Theupper ends of said levers 27 are pivotally connected at 3l to links 32whose upper4 ends are pivoted at 33 to ears 34 formed on the sides ofthe cylinder 2l.

able head 10 against which the angles a or other shapes are placed, inorder to properly poslition their ends inthe path of the milling too Airor other pressure fluid is admit-ted through pipe 22, from thehand-controlled three-Way valve 74 supplied with pressure air from pipe75, on top of pist-on 24 and moves the same downward, pipe 23 beingvented to the atmosphere through the threeway valve 74 and vent 76.

As the piston moves downward rod 25 moves downward, causing levers 27 toswing about their pivot 26 in the end of this rod, thereby causing theshoes 28 to move both l downward and inward unt-il they engage `-andhold the structural shape a in position on the table top 3.

36 and 36a are guides fixed on a portion of the frame 5.

37 is a tappet secured to and movable with the head 10, also serving toguide a verti- .cally movablel actuating rod 38 The rod 38 is providedwith a head 39, which is connected toa lever 42 that operates a threewayvalve 43. This valve is directly conn'ected with the pressure line pipe44 which has a branch 45, controlled by a regulating valve 46, leading'to the under Vside of the smaller pull-back pistons in cylinders `6 and8. Line pressure is always maintained beneath the'pistons inthe smallercylinders.

When the valve 43 is in position to admit pressure air, said air passesthrough pipe 44 and pipe 49 into the top of the' main cylinderl 7.Pressure on top of piston 9 causes the cutter head l() to descend andfeed across the face of the work, and when .the head is near the lowerend of its position the tappet 37 strikes the top of a coil sirinfT 50on rod 38 said s ring beinO' adjustably held in position by a collar 51and a set screw 52. The spring is then compressed until the pressure issuiiicient to cause lthe downward movementV of the rod 38 and the lever42 is immediately brought to its lowest position. The pressure medium ontop'of piston 9 then passes through I pipe 49, by-pass 62, valve 43, tothe exhaust head 64, the pressure being relieved on the upper'side ofpiston 9 allows the pull-back pistons to move upward by reason of thecontinuous line pressure being continually active on the under sides ofthese pistons. When the head l0 is moving to its upper position tappet37 strikesan adjustable stop (35 on rod 38, thus moving this rod upward,so that the three-way valve lever 42 will be moved to its centralposition, thus' holding the pressure head 10 stationary by cutting offthe exhaust from cylinder 7.

Then new work is clamped on the table top 3, lever 55 is depressed byhand, and the operation is repeated.

We claim-` 1. In a milling machine, the combination with a worksustaining table, of a vertically above the latter, crossed leverspivotally connected with said member intermediate their ends and bodilymovable thereby, links -pivotallyconnected to the power ends of saidlevers, and stationary abutments to which the links are pivotallyconnected -whereby the movement of said reciprocating member toward andfrom the table will -cause operative ends of said levers tosimultaneously move toward one another and toward the table and viceversa.

2. In a milling machine, t-he combination, with a work sustaining table,of a stationary cylinder mounted cent-rally above the latter, avertically movable piston in the cylinder,` crossed levers pivoted onthe piston rod intermediate their ends, and links pivotally connected tothe cylinder and to the power ends of the levers whereby the movement ofthe piston toward and from the table will cause the operative ends ofsaid levers to simultaneously move toward each other and toward thetable and vice versa.

3. In a milling machine, the combination with a work sustaining table,of a pair of floating crossed levers suspended above the table, a pivotconnecting the leverstogether attheir crossing point and about whichboth of said levers Swing, means to move said plvot and simultaneouslybodily move the levers to and from the table, and means to cause thelevers to swing on said pivot during their bodily movement.

4. ln a milling machine, the combination with a work sustaining table;of a pair of floating levers pivotally connected together after themanner of a pair of tongs, pivoted suspending links for the ends of saidlevers, shoes pivotally connected to the operative ends of said levers,limiting means secured to the levers and against which the shoes areadapted to swing when in inoperative position, a pressure fluid operatedpist-on and cylinder and a piston rod between the piston and pivotalconnection for the levers.

`In testimony that we claim the foregoing in presence of two subscribingwitnesses. PAUL A. CUENOT.

LEVIS G. FISCHER. Witnesses Geo. W. PARSONS, FRANK A. RonINs, Jr.

